5.4×7.8-2.2×4.6的简便运算是怎样算呢？
答:
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
=（10－4.6）×7.8－2.2×4.6
=10×7.8－4.6×7.8－2.2×4.6
=78－4.6×（7.8+2.2）
=78－4.6×10
=78－46
=32
=5.4*7.8-（10-7.8）*4.6
=5.4*7.8-10*4.6+7.8*4.6
=7.8*（5.4+4.6）-10*4.6
=7.8*10-10*4.6
=10*（7.8-4.6）
=10*3.2
=32
5.4x7.8-2.2x4.6(简便计算)?
答: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的简便运算?
5.4×7.8 =5×7.8+0.4×7.8 =39+3.12 =42.12 存疑请追问，满意请采纳
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 ...
4.2×7.8-2.8×4.2简算?
简便计算过程如下 4.2×7.8-2.8×4.2 =4.2×（7.8-2.8）=4.2×5 =21 望采纳
4.2×7.8+2.2×4.2简便计算?
4.2×7.8+2.2×4.2简便计算过程如下：4.2×7.8+2.2×4.2 =4.2×(7.8+2.2)=4.2×10 =42 所以4.2×7.8+2.2×4.2简便计算的最后结果是42。
4.2×7.8+2.2×4.2简便计算
4.2×7.8+2.2×4.2 =4.2×（7.8+2.2）=4.2×10 =42
7.8x5.6+2.3x4.4用简便方法计算急
7.8x5.6+2.3x4.4 =4*(7.8*1.6+2.3*1.1)=4*(12.48*2.53)=4*15.01 =60.04
7.8x5.6 2.2x4.4用简算怎麼算
7.8x5.6+ 2.2x4.4 =43.68+9.68 =53.36 没有简算，直接计算 千万别和乘法分配律混淆
4.7x7.8十2.2x4.2用简便方法计算
4.7x7.8十2.2x4.2用简便方法计算 4.7x7.8十2.2x4.2 =4.2*（7.8+2.2）+7.8*0.5 =42+3.9 =45.9
5.4×7.8+0.54×22简便计算?
使用乘法分配律
