口算大王
180÷9= |
400÷8= |
9×800= |
500×4= |
102+25= |
14×20= |
20×4= |
6×500= |
9×400= |
2×300= |
720÷8= |
90÷3= |
(25+75)×9= |
100﹣40÷2= |
18×2+30= |
口算
20×8= 400×5= 36×2= 16×4= 38×0=
540÷9=125-38=930÷3=1500÷3=7×7-2=5×9+7=
脱式计算。
3.25÷2.5÷45 ×0.5÷5 ×0.5
86.27-(28.9+16.27) 1.6×[1÷(2.1-2.09)]
满分练习:
5÷8= 6÷9=14×=
22×=
×
=
×
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×
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×
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×
=
×
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×
=
×
3×= 4×
= 0.5×
=
试一试
(1)45+15×6=(2)250÷5×8=
(3)6×5÷2×4= (4)30×3+8=
(5)400÷4+20×5= (6)10+12÷3+20=
(7)(80÷20+80)÷4= (8)70+(100-10×5)=
(9) -
= (10)
+
+
=
(11)6.3÷0.07=(12) ×13=
(13)3-1.95=(14) 0÷=
(15) 0.5-=(16)540÷9=
(17) -
=(18) 0.23+177%=
灵活计算。×
+
×
×0.375+
÷
(-
)×54 12.5×0.32×25