380-113 X2
9X34-128
13 X49=
90 X78=
37 X25=
68+35 X14
910 +(35+7)
260-220 +4
215+297
+9
342-28 6
910 +(35+7)
216 +2X4
280 +2+3
54 X37= 45 X60=
98 X25=
28 X32=
67 X40= 80
X29= 72
X38= 41
X21= 27
X44=
42 X28= 87
X32= 63
X32= 43 X59= 25
X4 X5=
直接写出得数。
30 X50 =
4X5+9 =
5X4+6 =
68-17 =
50 X70 =
25 X30 =
12-4 X2 =
44 X20 =
18 X10 =
17 X60 =
3+4 X7 =
80 +5 =
83 X10 =
31 X78 内
12 X2-6 =
450 +3 =
50 X60 =
68 X52 内
5 X12 =
40 X22 =
18+6 X3= 18-5 X3 =
5 X14 =
9 X4+1 =
19 X20 =
21-4 X2 =
13 X4 =
240 ^8= 90 ^-6 =
1000-128 = 785+642 = 4000-896 =
690 +3 =
＜或=
79 X50( 4000
27 X61 ( 1800
27 36
X27 56 X12( 56+12 36 X24
12
24 X50 ( 25 X40
75 X20 ( 750
6米（6加分米
4500 克
千克
4
0 X (6+4 )
20
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