题目内容
用“十加十、个加个”的方法算.
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例: 38+29=□ |
( 1)58+37= |
|
|
30+20=50 |
__________ |
|
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8+9=17 |
__________ |
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50+17=57 |
__________ |
|
|
( 2)38+46= |
( 3)18+67= |
( 4)28+57= |
|
__________ |
__________ |
__________ |
|
__________ |
__________ |
__________ |
|
__________ |
__________ |
__________ |
答案:95;84;85;85
解析:
解析:
|
(1)58 +37=,50+30=80,8+7=15,80+15=95;(2)38 +46=,30+40=70,8+6=14,70+14=84;(3)18 +67=,10+60=70,8+7=15,70+15=85;(4)28 +57=,20+50=70,8+7=15,70+15=85 |
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用“十加十、个加个”的方法算.
|
例: 38+29=□ |
(1)67 +28= |
(2)35 +28= |
|
30+20=50 |
__________ |
__________ |
|
8+9=17 |
__________ |
__________ |
|
50+17=57 |
__________ |
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(3)39 +27= |
(4)47 +47= |
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__________ |
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用“十加十、个加个”的方法算.
|
例:38+29=□ |
( 1)58+37= |
|
|
30+20=50 |
__________ |
|
|
8+9=17 |
__________ |
|
|
50+17=57 |
__________ |
|
|
( 2)38+46= |
( 3)18+67= |
( 4)28+57= |
|
__________ |
__________ |
__________ |
|
__________ |
__________ |
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|
__________ |
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用“十加十、个加个”的方法算.
|
例: 38+29=□ |
(1)67 +28= |
(2)35 +28= |
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30+20=50 |
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|
8+9=17 |
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__________ |
|
50+17=57 |
__________ |
__________ |
|
(3)39 +27= |
(4)47 +47= |
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|
__________ |
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