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(3)一个因数是4,另一个因数是5,积是多少?
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(4)一个因数是5,另一个因数是3,积是多少?
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(5)一个因数是2,另一个因数是6,积是多少?
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5.画△表示乘法算式.
(1)2×3 △△ △△ △△
(2)5×3______________________________________
(3)3×4______________________________________
(4)2×6______________________________________
6.把加法算式改写成乘法算式.
(1)2+2+2+2+2___________________
(2)3+3+3_________________________
(3)4+4+4+4______________________
(4)5+5____________________________
(5)6+6+6+6+6___________________
(6) 3+3+3+3__________________________
(7)4+4+4______________________________
(8)1+1+1+1+1+1+1______________________
7.看图写乘法算式.