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It supports mathematical functions (including trigonometric functions).
Current location：Mathematical operation > History of Mathematical Computation > Answer
Overview: 2 questions will be solved this time.Among them
☆2 arithmetic calculations
[1/2 Formula]
Work: Calculate the value of equation 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1 .
Question type: Mathematical calculation
Solution:
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=3+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=6+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=10+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=15+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=21+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=28+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=36+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=45+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=55+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=66+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=78+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=91+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=105+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=120+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=136+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=153+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=171+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=190+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=210+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=231+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=251+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=270+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=288+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=305+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=321+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=336+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=350+13+12+11+10+9+8+7+6+5+4+3+2+1
=363+12+11+10+9+8+7+6+5+4+3+2+1
=375+11+10+9+8+7+6+5+4+3+2+1
=386+10+9+8+7+6+5+4+3+2+1
=396+9+8+7+6+5+4+3+2+1
=405+8+7+6+5+4+3+2+1
=413+7+6+5+4+3+2+1
=420+6+5+4+3+2+1
=426+5+4+3+2+1
=431+4+3+2+1
=435+3+2+1
=438+2+1
=440+1
=441
Answer:1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1=441
[2/2 Formula]
Work: Calculate the value of equation 0.2×2+0.4×4+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18 .
Question type: Mathematical calculation
Solution:
0.2×2+0.4×4+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+0.4×4+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+10+14.4+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+10+14.4+19.6+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+10+14.4+19.6+25.6+1.8×18
=0.4+1.6+3.6+6.4+10+14.4+19.6+25.6+32.4
=2+3.6+6.4+10+14.4+19.6+25.6+32.4
=5.6+6.4+10+14.4+19.6+25.6+32.4
=12+10+14.4+19.6+25.6+32.4
=22+14.4+19.6+25.6+32.4
=36.4+19.6+25.6+32.4
=56+25.6+32.4
=81.6+32.4
=114
Answer:0.2×2+0.4×4+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18=114
☆2 arithmetic calculations
[1/2 Formula]
Work: Calculate the value of equation 1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1 .
Question type: Mathematical calculation
Solution:
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=3+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=6+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=10+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=15+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=21+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=28+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=36+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=45+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=55+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=66+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=78+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=91+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=105+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=120+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=136+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=153+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=171+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=190+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=210+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=231+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=251+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=270+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=288+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=305+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=321+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=336+14+13+12+11+10+9+8+7+6+5+4+3+2+1
=350+13+12+11+10+9+8+7+6+5+4+3+2+1
=363+12+11+10+9+8+7+6+5+4+3+2+1
=375+11+10+9+8+7+6+5+4+3+2+1
=386+10+9+8+7+6+5+4+3+2+1
=396+9+8+7+6+5+4+3+2+1
=405+8+7+6+5+4+3+2+1
=413+7+6+5+4+3+2+1
=420+6+5+4+3+2+1
=426+5+4+3+2+1
=431+4+3+2+1
=435+3+2+1
=438+2+1
=440+1
=441
Answer:1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+20+19+18+17+16+15+14+13+12+11+10+9+8+7+6+5+4+3+2+1=441
[2/2 Formula]
Work: Calculate the value of equation 0.2×2+0.4×4+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18 .
Question type: Mathematical calculation
Solution:
0.2×2+0.4×4+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+0.4×4+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+1×10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+10+1.2×12+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+10+14.4+1.4×14+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+10+14.4+19.6+1.6×16+1.8×18
=0.4+1.6+3.6+6.4+10+14.4+19.6+25.6+1.8×18
=0.4+1.6+3.6+6.4+10+14.4+19.6+25.6+32.4
=2+3.6+6.4+10+14.4+19.6+25.6+32.4
=5.6+6.4+10+14.4+19.6+25.6+32.4
=12+10+14.4+19.6+25.6+32.4
=22+14.4+19.6+25.6+32.4
=36.4+19.6+25.6+32.4
=56+25.6+32.4
=81.6+32.4
=114
Answer:0.2×2+0.4×4+0.6×6+0.8×8+1×10+1.2×12+1.4×14+1.6×16+1.8×18=114