口算.
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(1)2.6 -0.8= |
(2)0.32 +0.21= |
|
(3)1 -0.42= |
(4)0.3 +0.8= |
|
(5)0.8 +0.35= |
(6)7.2 +2.8= |
|
(7)0.58 -0.41= |
(8)0.86 -0.6= |
直接写出得数,看谁算得又对又快.
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(1)42 ÷6×3= |
(2)27 -13+16= |
|
(3)3 ×9+10= |
(4)4 +0.2= |
直接写出得数,看谁算得又对又快.
|
(1)5 ×9-20= |
(2)83 -7×9= |
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(3)14 +72÷8 |
(4)9 -5.72= |
直接写出得数,看谁算得又对又快.
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(1)25 ÷5×4= |
(2)(32 +8)÷5= |
|
(3)16 ÷4+30= |
(4)0.8 +0.5= |
口算.
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(1)15 ×2= |
(2)28 ×2= |
(3)300 ×20= |
(4)10 ×500= |
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(5)17 ×3= |
(6)16 ×5= |
(7)200 ×40= |
(8)20 ×90= |
直接写得数.
|
240 ×20= |
10 ×350= |
600 ×40= |
比比谁算得快.
|
(1)4.6 +2.1= |
(2)5.2 +0.7= |
(3)3.5 +7.2= |
|
(4)6.3 +0.5= |
(5)7.4 -2.2= |
(6)6.9 -1.5= |
|
(7)4.7 -0.7= |
(8)8.2 -5.2= |