= =
+ = 6.3÷0.07=
3-1.95=
600×4= 500×7= 6×80= 49÷7=
90÷5= 63+9= 45÷5= 55+7=
200-84= 1600÷4= 98-48= 64÷8=
140×7= 85×8= 936×0= 600×6=
1- = + = 1- = + =
102÷2= 33×20= 17×30= + =
120×40= 480÷5= 53×20= 1- =
18×62≈ 81÷9= 30×51≈ 48÷4=
① + = ② + = ③ - = ④0.23×0.1=
⑤1- = ⑥ - = ⑦1- - = ⑧2÷0.5 =
= 7+7÷7-7= 14×25×8=
( )+ = + 98+98×99= 340-40÷5=