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简便方法计算题四年级
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小学四年级数学简便运算和解方程
一、口算:
25×2= 125×2= 4×25= 25×8= 4×125= 75×4= 25×5= 125×8=
二、能简便的用简便计算
3.78×4-6.13 (0.18+2.4)×3.6 3.9×(4.1+2.9)
(4+0.4)×0.25 8×7×1.25 (4.8-3.2)×12.5
12.1- 2.1×1.2 36×2.7+3.36×7.3 13.9×5.2-3.9×5.2
2.5×9.78×0.4 38×79+79×61+79 0.38×101
0.58×99+5.8×0.1 5.6×132-3.2×56 6.2÷2.5÷0.2
4.38×101-4.38 3.2×1.25×25 3.25×1.1
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一、口算:
25×2= 125×2= 4×25= 25×8= 4×125= 75×4= 25×5= 125×8=
二、能简便的用简便计算
3.78×4-6.13 (0.18+2.4)×3.6 3.9×(4.1+2.9)
(4+0.4)×0.25 8×7×1.25 (4.8-3.2)×12.5
12.1- 2.1×1.2 36×2.7+3.36×7.3 13.9×5.2-3.9×5.2
2.5×9.78×0.4 38×79+79×61+79 0.38×101
0.58×99+5.8×0.1 5.6×132-3.2×56 6.2÷2.5÷0.2
4.38×101-4.38 3.2×1.25×25 3.25×1.1
var script = document.createElement('script'); script.src = 'http://static.pay.baidu.com/resource/baichuan/ns.js'; document.body.appendChild(script);
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