1.算一算。
68-9×5
4×8-13
8×(3+5)
(18+36)÷9
68-9×5
4×8-13
8×(3+5)
(18+36)÷9
答案
1. 68 - 9×5
= 68 - 45
= 23
2. 4×8 - 13
= 32 - 13
= 19
3. 8×(3 + 5)
= 8×8
= 64
4. (18 + 36)÷9
= 54÷9
= 6
= 68 - 45
= 23
2. 4×8 - 13
= 32 - 13
= 19
3. 8×(3 + 5)
= 8×8
= 64
4. (18 + 36)÷9
= 54÷9
= 6
2.在□里填上合适的数。
26= 4×6+
26= 5×6-
22= 3×8-
22= 3×7+
12= 6+
6= (6+
26= 4×6+
2
□26= 5×6-
4
□22= 3×8-
2
□22= 3×7+
1
□12= 6+
36
÷66= (6+
30
)÷6答案
2;4;2;1;36;30
解析
26=4×6+□
解:4×6=24,26-24=2,□=2
26=5×6-□
解:5×6=30,30-26=4,□=4
22=3×8-□
解:3×8=24,24-22=2,□=2
22=3×7+□
解:3×7=21,22-21=1,□=1
12=6+□÷6
解:12-6=6,□÷6=6,□=6×6=36
6=(6+□)÷6
解:6×6=36,6+□=36,□=36-6=30
解:4×6=24,26-24=2,□=2
26=5×6-□
解:5×6=30,30-26=4,□=4
22=3×8-□
解:3×8=24,24-22=2,□=2
22=3×7+□
解:3×7=21,22-21=1,□=1
12=6+□÷6
解:12-6=6,□÷6=6,□=6×6=36
6=(6+□)÷6
解:6×6=36,6+□=36,□=36-6=30
3.看图并列式计算。

综合算式:

综合算式:
综合算式:
43+3×4
综合算式:
(98-71)÷(4-1)
答案
43+3×4
(98-71)÷(4-1)
(98-71)÷(4-1)
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