84÷63X3 1X5.3+2.1X6.2-2.1X1.5

84÷63X3
=84X3÷63
=252÷63
=4
2.1X5.3+2.1X6.2-2.1X1.5
=2.1X(5.3+6.2-1.5)
=2.1X10
=21
同学，你是不是把第二题抄错了呀？

1.＝84/（63/3）
＝84/21
＝4
2.＝5.3+2.1*（6.2-1.5）
＝5.3＋2.1*4.7
＝10＋1.1*4.7
＝15.17

228.9

84X1、21+=4

84=7*12 63=7*9 84/63=12/9=4/3 84/63*3=3*4*7/(3*3*7)*3=4
2.1*5.3+2.1*6.2-2.1*1.5=2.1(5.3+6.2-1.5)=2.1*10=21

84÷63X3=（ 21X3）X4÷（21X3）=4
2.1X5.3+2.1X6.2-2.1X1.5=2.1X（5.3+6.2-1.5）=2.1X10=21

计算公式步骤如下：
84÷63X3 1X5.3+2.1X6.2-2.1X1.5
=1/1/3X3 =5.3+13.02-3.15
=4 =18.32-3.15
=15.17

﹙1﹚84÷63×3
＝21×4÷21÷3×3
＝4×﹙21÷21﹚×﹙3÷3﹚
＝4
﹙2﹚1×5.3＋2.1×6.2－2.1×1.5
＝5.3＋2.1×﹙6.2－1.5﹚
＝5.3＋2.1×4.7
＝5.3＋4.7＋1.1×4.7
＝10＋5.17
＝15.17.

（1）=21X4÷21÷3X3
=21÷21 X3÷3X4
=4

计算器