=5.4x(8-0.2)
=5.4x8-5.4x0.2
=43.2-1.08
=42.12
æ5.4x7.8
=(5+0.4)x7.8
=5x7.8+0.4x7.8
=39+3.12
42.12
第äºä¸ª2.7x4.4
=(3-0.3)x4.4
=3x4.4-0.3x4.4
=13.2-1.32
=11.88
5.4×7.8 2.7×4.4怎么简算
第一个5.4x7.8 =5.4x(8-0.2)=5.4x8-5.4x0.2 =43.2-1.08 =42.12 或5.4x7.8 =(5+0.4)x7.8 =5x7.8+0.4x7.8 =39+3.12 42.12 第二个2.7x4.4 =(3-0.3)x4.4 =3x4.4-0.3x4.4 =13.2-1.32 =11.88 ...
5.4×7.8+2.7×4.4怎么简算呀!
=2.7×（15.6+4.4）=2.7×20 =54
5.4x7.8-2.2x4.6(简便计算)?
54×7.8-2.2×4.6=32 【原因】首先按照先乘除后加减的方法来计算，然后首先运用脱式计算比较方便
5.4×7.8+0.54×22简便计算?
使用乘法分配律
7.8×5.6+4.4的简便计算
35.2
6.1×8.8+7.8×4.4怎么使用简便方法计算?
6.1×8.8+7.8×4.4=88
怎么做?
3、脱式计算(能简算的要简算) 2.5×7.1×4 16.12×99+16.12 5.2×0.9+0.9 7.28×99+7.28 4.3×50×0.2 64-2.64×0.5 26×15.7+15.7×24 (2.275 +0.625)×0.28 3.94+34.3×0.2 1.2×(9.6÷2.4)÷4.8 8.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46 8.05×3.4+7.6 6.58×4.5×0.9 2.8×0.5+1.58 32+4....
7.8×5.4-6.8×5.4如何简算?
根据题意，这道题用到的简便计算方法是乘法结合律，计算方法如下：原式=（7.8-6.8）*5.4=1*5.4=5.4。
请问:4.8×7.8+78×0.52用简便方法计算?
4.8×7.8+78×0.52=78。简便计算过程如下：4.8×7.8+78×0.52 =0.48×10×7.8+78×0.52 =（0.48+0.52）×78 =1×78 =78
