苏教版四年级数学下册运算定律专项练习题39文档格式.docx
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6=(82+____)×
19×
15+19×
55=____〇(____〇____)
35×
(47+23)=____〇____〇____〇____
二、怎样简便怎样计算。
380+40280×
25201×
49
21×
40+460×
21(12+6)×
512×
10×
125
87+37+63444+402
35+85+25+115705+282
53+54+55+56+5789+145+311
5+7+9+11+13+15+17+19+21+23
15×
45×
2125×
17×
828×
202
62×
109+38×
10983×
(20+1)804×
23
三、下面各题,怎样算简便就怎样算。
931-106-94204-18-82
55+46=46+____
55×
83=____〇×
55
39+27+53=39〇(____〇____)
53×
2=53×
(18×
7)=(5×
4×
(17×
5)=17×
(54+40)×
8=54×
____+40×
44×
2+35×
2=(44+____)×
39+19×
31=____〇(____〇____)
(42+38)=____〇____〇____〇____
505+70368×
25102×
19
34×
160+240×
34(44+8)×
533×
5
54+14+86657+704
29+52+71+48104+197
44+45+46+47+4892+35+708
4+5+6+7+8+9+10+11+12+13
225×
11×
617×
304
57×
26+43×
2638×
(10+2)203×
20
660-180-320279-13-87
26+38=38+____
68×
11=____〇×
68
66+40+50=66〇(____〇____)
37×
8=37×
(14×
19)=(5×
(27+73)×
4=27×
____+73×
20+56×
20=(11+____)×
19+20×
61=____〇(____〇____)
71×
(32+68)=____〇____〇____〇____
375+20332×
24
26×
22+378×
26(16+8)×
2524×
14×
64+24+76850+603
29+72+71+28804+350
36+37+38+39+40146+39+54
18×
65×
213×
403
32×
41+68×
4167×
(10+5)804×
26
674-118-182113-28-72
15+43=43+____
65=____〇×
98+32+28=98〇(____〇____)
46×
6=46×
21)=(5×
16×
(21×
5)=21×
(12+10)×
8=12×
____+10×
40×
10+64×
10=(40+____)×
3×
26+3×
34=____〇(____〇____)
(49+21)=____〇____〇____〇____
294+90228×
42
52×
109+191×
52(6+8)×
556×
25
78+35+65734+701
10+21+80+79401+465
39+40+41+42+43139+70+561
8+9+10+11+12+13+14+15+16+17
625×
815×
502
48×
83+52×
8388×
(50+3)702×
30
700-30-170225-17-83
57+44=44+____
91×
18=____〇×
91
37+14+86=37〇(____〇____)
2=32×
(15×
5)=15×
(10+59)×
6=10×
____+59×
69×
15+74×
15=(69+____)×
17+17×
43=____〇(____〇____)
(46+34)=____〇____〇____〇____
604+80280×
25101×
40
190+110×
17(40+6)×
2548×
75+40+60107+902
19+14+61+86803+448
70+71+72+73+7444+90+556
9+11+13+15+17+19+21+23+25+27
13×
4125×
603
88×
65+12×
6567×
(30+4)503×
992-169-131130-55-45
91+23=23+____
33×
69=____〇×
33
64+34+36=64〇(____〇____)
2=69×
(96+75)×
4=96×
____+75×
80×
16+73×
16=(80+____)×
11+4×
49=____〇(____〇____)
(11+59)=____〇____〇____〇____
970+2028×
92×
40+360×
92(40+6)×
518×
76+90+10553+202
34+28+26+172805+400
29+30+31+32+3358+33+742
7×
23×
812×
801
114+82×
11479×
(40+3)302×
16
566-76-324244-25-75
51+68=68+____
87×
88=____〇×
87
36+31+69=36〇(____〇____)
61×
2=61×
(7×
5)=7×
(88+15)×
8=88×
____+15×
14+21×
14=(87+____)×
12+14×
68=____〇(____〇____)
78×
(36+24)=____〇____〇____〇____
481+80276×
36
21+379×
25(14+6)×
2575×
27+49+51738+701
44+44+36+56804+155
39+40+41+42+43126+137+174
7+8+9+10+11+12+13+14+15+16
25×
423×
83+66×
8362×
(30+5)201×