题目内容
| 我是神算手: 9.42+7.39+1.58 | 125×32×25 | 1800÷25×4 |
| 676+324÷81-81 | 37×99+37 | 18.4-1.6-5.4. |
(1)9.42+7.39+1.58,
=(9.42+1.58)+7.39,
=11+7.39,
=18.39;
(2)125×32×25,
=125×8×4×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(3)1800÷25×4,
=18×100÷25×4,
=18×(100÷25)×4,
=18×4×4,
=288;
(4)676+324÷81-81,
=676+4-81,
=680-81,
=599;
(5)37×99+37,
=37×(99+1),,
=37×100,
=3700;
(6)18.4-1.6-5.4,
=18.4-(1.6+5.4),
=18.4-7,
=11.4.
=(9.42+1.58)+7.39,
=11+7.39,
=18.39;
(2)125×32×25,
=125×8×4×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(3)1800÷25×4,
=18×100÷25×4,
=18×(100÷25)×4,
=18×4×4,
=288;
(4)676+324÷81-81,
=676+4-81,
=680-81,
=599;
(5)37×99+37,
=37×(99+1),,
=37×100,
=3700;
(6)18.4-1.6-5.4,
=18.4-(1.6+5.4),
=18.4-7,
=11.4.
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