用递等式计算,能简算的要简算7.28-(1.284+0.25)8×4×12.5×2.537×9+37×122618-(486÷18×35)(56-34)×24-3535÷((23+0.2)×213)-六年级数学
题文
用递等式计算,能简算的要简算 7.28-(1.284+0.25) 8×4×12.5×2.5
2618-(486÷18×35) (
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答案
(1)7.28-(1.284+0.25) =7.28-(1.284+0.25) =7.28-1.534 =5.746; (2)8×4×12.5×2.5 =(8×12.5)×(4×2.5) =100×10 =1000; (3)
=
=
=9; (4)2618-(486÷18×35) =2618-(27×35) =2618-945 =1673; (5)(
=24×
=20-18-
=2-
=1
(6) |