用简便方法计算: 102×43 &...
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解决时间 2021-02-12 14:02
- 提问者网友:你独家记忆
- 2021-02-12 03:19
用简便方法计算: 102×43 &...
最佳答案
- 五星知识达人网友:神也偏爱
- 2021-02-12 04:23
①102×43
=100×43+2×43
=4300+86
=4386;
②16×57+43×16
=16×(57+54)
=16×100
=1600;
③7.8+5.26+3.74+2.2
=(7.8+2.2)+(5.26+3.74)
=10+9
=19;
④67×8×125
=67×(8×125)
=67×1000
=67000;
⑤250×17×4×2
=(250×4)×(17×2)
=1000×34
=34000;
⑥(125+1250)×8
=125×8+1250×8
=1000+10000
=11000.
=100×43+2×43
=4300+86
=4386;
②16×57+43×16
=16×(57+54)
=16×100
=1600;
③7.8+5.26+3.74+2.2
=(7.8+2.2)+(5.26+3.74)
=10+9
=19;
④67×8×125
=67×(8×125)
=67×1000
=67000;
⑤250×17×4×2
=(250×4)×(17×2)
=1000×34
=34000;
⑥(125+1250)×8
=125×8+1250×8
=1000+10000
=11000.
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