表示什么数?
(1)29+ =35 =35﹣29
(2) ﹣32=7 =7+32
(3) ×9=63 =63÷9
(4) ÷6=12 =12×6.
已知○+△=□,●×▲=■,下面哪算式是正确的?正确的画“√”,错误的画“×”.
(1)△+□=○
(2)○+□=△
(3)□﹣○=△
(4)▲×■=●
(5)■÷●=▲
(6)■÷▲=● .
求横线里的数:
(1)54.22﹣ =36.78
(2)42.9÷ =14.3
(3)35× =35.35
(4)3.6+ =26.4
(5) ÷1.4=2.8
(6) ﹣0.75=8.75.
在 里填上合适的数.
(1)368+ =1235 (2) +196=729
(3)596﹣ =128 (4) ﹣313=287
(5)28× =336 (6) ×43=1118
(7)125÷ =5 (8)450÷ =25
(9) ÷16=16 (10) ÷35=12.
根据1260÷45=28,写出下面各式的得数.
630÷45=
45×28=
2520÷90=
2800×450=
420÷15=
56×45= .
在横线里填上适当的数.
(90﹣60)× =150 408÷8+ =100
(960﹣60)÷ =5 ×(54﹣48)=726.