140×5= 14×20=
14×25= 112×50=
①70-29.6-10.4
②283×5+17×5
③73+3.4+27+5.6
④10-2.75-3.25
⑤85×99
⑥25×64×125
x
6
12
18
24
…
y
30
15
10
7.5
= ﹣0.25= 0÷5=
= 5.4×= 80×0.7=