用简便方法计算.(6+18)×125 89×39+89 &nb
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:数学作业 时间:2024/07/31 21:17:54
用简便方法计算. (6+18)×125 | 89×39+89 | 41×201 |
79×33+79×67 | 57×11 | 425×101. |
![用简便方法计算.(6+18)×125 89×39+89 &nb](/uploads/image/z/2461800-48-0.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%8E%EF%BC%886%2B18%EF%BC%89%C3%97125%26nbsp%3B%26nbsp%3B%26nbsp%3B%26nbsp%3B+89%C3%9739%2B89%26nbsp%3B%26nb)
①(6+18)×125
=6×125+18×125
=750+2250
=3000;
②89×39+89
=89×(39+1)
=89×40
=3560;
③41×201
=41×200+41
=8200+41
=8241;
④79×33+79×67
=79×(33+67)
=79×100
=7900;
⑤57×11
=57×10+57
=570+57
=627;
⑥425×101
=425×100+425
=42500+425
=42925.
=6×125+18×125
=750+2250
=3000;
②89×39+89
=89×(39+1)
=89×40
=3560;
③41×201
=41×200+41
=8200+41
=8241;
④79×33+79×67
=79×(33+67)
=79×100
=7900;
⑤57×11
=57×10+57
=570+57
=627;
⑥425×101
=425×100+425
=42500+425
=42925.