4.23×1.28+0.423×9.2 简便运算9.8×3.6+0.1×7.2 用递等式简便计算
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4.23×1.28+0.423×9.2简便运算9.8×3.6+0.1×7.2用递等式简便计算4.23×1.28+0.423×9.2简便运算9.8×3.6+0.1×7.2用递等式简便计算4.23×1.2
4.23×1.28+0.423×9.2 简便运算9.8×3.6+0.1×7.2 用递等式简便计算
4.23×1.28+0.423×9.2 简便运算9.8×3.6+0.1×7.2 用递等式简便计算
4.23×1.28+0.423×9.2 简便运算9.8×3.6+0.1×7.2 用递等式简便计算
4.23×1.28+0.423×9.2
=4.23×1.28+4.23×0.92
=4.23×(1.28+0.92)
=4.23×1.2
=4.23×1+4.23×0.2
=4.23+0.846
=5.076
9.8×3.6+0.1×7.2
=9.8×3.6+0.2×3.6
=3.6×(9.8+0.2)
=3.6×10
=36
4.23×1.28+0.423×9.2 简便运算9.8×3.6+0.1×7.2 用递等式简便计算
4.23×1.08+0.423×9.2用简便方法计算
4.23 *9.9+0.423 简算
4.23*1.08+0.423*9.2和9.8*3.6+0.1*7.2用递等式简便计算
4.23*1.08+0.423*9.2和9.8*3.6+0.1*7.2用递等式简便计算
3.75*4.23*36-125*0.423*2.8
42.8*6.3+4.23*25+0.423*120简便运算
3.75*4.23*36-125*0.423*2.要过程和原理（运算定律之类的）快!
3.75乘4.23乘36-125乘0.423乘2.8怎么简便计算
3.75*4.23*36-125*0.423*3.8一小时内我有急用啊
3.75乘4.23乘36-125乘0.423乘2.8巧算方法3.75*4.23*36-125*0.423*2.8=4.23*(3.75*36-12.5*2.8)=4.23*12.5*(0.3*36-2.8)=4.23*12.5*8=4230.怎么来的;用提取公因数的方法,求高手指教,
3.75乘4.23乘36-125乘0.423乘2.8巧算方法3.75*4.23*36-125*0.423*2.8=4.23*(3.75*36-12.5*2.8)=4.23*12.5*(0.3*36-2.8)=4.23*12.5*8=4230.怎么来的;用提取公因数的方法,求高手指教,
用筒便方法计算下列各题： 7.24*0.1+0.5*72.4+0.049*724 3.75*4.23*36-125*0.423*2.8
用筒便方法计算下列各题：7.24*0.1+0.5*72.4+0.049*724 3.75*4.23*36-125*0.423*2.8
3.6*42.3*3.75-12.5*0.423*28
9.2*0.48+1.52*9.2-9.2简算
9.2×35+9.2×64+9.2简便计算
9.2*2.6+6.4*9.2+9.2简算