题目内容
口算
(1)42+5
= (2)20+17= (3) 6+23= (4)32+40=
答案:47;37;29;72
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口算.
|
(1)23 +5 |
(2)30 +50 |
(3)7 +40 |
(4)70 -40 |
|
(5)78 +9 |
(6)51 -6 |
(7)97 -9 |
(8)33 +20 |
|
(9)42 -7 |
(10)35 +8 |
(11)26 +40 |
(12)56 -9 |
口算.
|
(1)65 -5= |
(2)35+2= |
|
(3)15 -10= |
(4)67 -42= |
口算.
| 1.8×0.5= | 49×0.2= | 10÷2.5= | 0.83÷0.1= | 2.4-0.8= |
| 0.44÷2.2= | 0.6×0.5= | 0.4+0.15= | 1.25×8= | 0.56÷8= |
| 12.5×18.5×0.8= | 5.38+0.45+1.55= | 0.42÷0.7÷0.6= | 0.74×0.6+0.74×0.4= |