一、分数与整数相乘。(每题1分,共24分)
112
×4= 26× = ×5= ×6 = 56
12131514 ×8 = 12×516 = 42×928 = 65 ×15 = 24×13248 = 21 ×7= 4 ×15= 7 ×12= 16×9
251820 = 1415 ×30= 10911 ×121= 14 ×21 = 71699 ×7= 27 ×54= 11×22 =
二、分数和分数相乘。(每题1分,共18分)
13
9
44
×11 = 3
10
×20= 17×13
51
= 5×3
11
= 14
15
×20= 23675897
× = × = × = × = 54789151115
12154921575
× = × = × = × = 2516510316821
4271425203718 × = × = × = × = 9161521278935
2217451911817
× = × = × = × = 1115276833381720
6
1217326
× = × = 34361337
三、分数乘、加、减混合。(每题2分,共16分)
50241553254 ×( - ) × ×14 × +1 + × 166375166431215
7
527183865198 - × 1- × ×(5- ) ×7+ 14935194515139113
9
四、分数乘、加、减简便运算。(每题2分,共42分)
137511917
× ×5 ( + )×24 × ×14 15268121418
1520192551 × × × × ×22× 162151036332
5497979( - )×36 99× - × 6967 ×12×712 38 ×712 +512 ×38 5356 ×57 183 ×(3 -56 ) 98 815 ×47 ×316 517 ×79 +79 ×417 517 +517 ×16 (13+19 )×913 131813
911 ×97×119
1225 ×15-7
25
×15 231625 ×161
17 +25 ×17
666613 ×12+13
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