总述:本次共解4题。其中
☆算术计算3题
☆整数计算1题
〖1/4算式〗
作业:求算式 9+99+999+9999+99999 的值.
题型:数学计算
解:
9+99+999+9999+99999
=108+999+9999+99999
=1107+9999+99999
=11106+99999
=111105 答案:9+99+999+9999+99999=111105〖2/4算式〗
作业:求算式 12+23+34+45+56+67+78+89+91 的值.
题型:数学计算
解:
12+23+34+45+56+67+78+89+91
=35+34+45+56+67+78+89+91
=69+45+56+67+78+89+91
=114+56+67+78+89+91
=170+67+78+89+91
=237+78+89+91
=315+89+91
=404+91
=495 答案:12+23+34+45+56+67+78+89+91=495〖3/4算式〗
作业:求算式 98+197+2996+39995+499994+5999993+69999992+799999991 的值.
题型:数学计算
解:
98+197+2996+39995+499994+5999993+69999992+799999991
=295+2996+39995+499994+5999993+69999992+799999991
=3291+39995+499994+5999993+69999992+799999991
=43286+499994+5999993+69999992+799999991
=543280+5999993+69999992+799999991
=6543273+69999992+799999991
=76543265+799999991
=876543256 答案:98+197+2996+39995+499994+5999993+69999992+799999991=876543256〖4/4整数列竖式计算〗
题型:整数乘法
原题:8*12345679011 解:
8*12345679011 =
98765432088 列竖式计算:
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| | | | | | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 0 | 8 | 8 |
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