题目内容
用“十加十、个加个”的方法算.
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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 |
__________ |
__________ |
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(3)39 +27= |
(4)47 +47= |
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__________ |
__________ |
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__________ |
__________ |
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__________ |
__________ |
答案:95;63;66;94
解析:
解析:
|
(1)67 +28=,60+20=80,7+8=15,80+15=95;(2)35 +28=,30+20=50,8+5=13,50+16=63;(3)39 +27=,30+20=50,9+7=16,50+16=66;(4)47 +47=,40+40=80,7+7=14,80+14=94; |
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用“十加十、个加个”的方法算.
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例:38+29=□ |
( 1)58+37= |
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30+20=50 |
__________ |
|
|
8+9=17 |
__________ |
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50+17=57 |
__________ |
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( 2)38+46= |
( 3)18+67= |
( 4)28+57= |
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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 |
__________ |
__________ |
|
(3)39 +27= |
(4)47 +47= |
|
|
__________ |
__________ |
|
|
__________ |
__________ |
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