题目内容
脱式计算.(能简算的要简算)
| ①1.258×18.5-0.258×18.5 | ②8.48÷0.8×0.9 |
| ③1.25×2.4 | ④5.85÷(1.3+0.5)×6. |
①1.258×18.5-0.258×18.5,
=18.5×(1.258-0.258),
=18.5×1,
=18.5;
②8.48÷0.8×0.9,
=10.6×0.9,
=9.54;
③1.25×2.4,
=1.25×8×0.3,
=10×0.3,
=3;
④5.85÷(1.3+0.5)×6,
=5.85÷1.8×6,
=3.25×6,
=19.5.
=18.5×(1.258-0.258),
=18.5×1,
=18.5;
②8.48÷0.8×0.9,
=10.6×0.9,
=9.54;
③1.25×2.4,
=1.25×8×0.3,
=10×0.3,
=3;
④5.85÷(1.3+0.5)×6,
=5.85÷1.8×6,
=3.25×6,
=19.5.
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