题目内容
9×7+9=
[ ]
|
A.27 |
B.36 |
C.54 |
D.72 |
答案:D
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先观察,再计算.
|
(1)5 ×3+5= |
5 ×4= |
|
(2)7 ×3+3= |
8 ×3= |
|
(3)4 ×6+6= |
5 ×6= |
|
(4)2 ×5-2= |
2 ×4= |
|
(5)9 ×4+9= |
( )×( )= |
|
(6)7 ×5-7= |
( )×( )= |
|
(7)3 ×7+3= |
( )×( )= |
|
(8)6 ×1+6= |
( )×( )= |
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例:
3÷3+3-3=1 33÷33=1(1)
|
① 3 3 3 3=1 |
② 3 3 3 3=2 |
|
③ 3 3 3 3=3 |
④ 3 3 3 3=4 |
|
⑤ 3 3 3 3=5 |
⑥ 3 3 3 3=6 |
|
⑦ 3 3 3 3=7 |
⑧ 3 3 3 3=8 |
|
⑨ 3 3 3 3=9 |
⑩ 3 3 3 3=10 |
(2)
|
① 3 3 3 3=1 |
② 3 3 3 3=2 |
|
③ 3 3 3 3=3 |
④ 3 3 3 3=4 |
|
⑤ 3 3 3 3=5 |
⑥ 3 3 3 3=6 |
|
⑦ 3 3 3 3=7 |
⑧ 3 3 3 3=8 |
|
⑨ 3 3 3 3=9 |
⑩ 3 3 3 3=10 |
|
① 3 3 3 3=1 |
② 3 3 3 3=2 |
|
③ 3 3 3 3=3 |
④ 3 3 3 3=4 |
|
⑤ 3 3 3 3=5 |
⑥ 3 3 3 3=6 |
|
⑦ 3 3 3 3=7 |
⑧ 3 3 3 3=8 |
|
⑨ 3 3 3 3=9 |
⑩ 3 3 3 3=10 |