1.直接写出得数。(每题2★)
215+342=
353-218=
3×(78-8)=
718-314=
45×40=
(52-13)÷13=
84÷7=
307-64=
20×(27+13)=
757-757=
428+165=
560÷(2+6)=
520÷13=
0×137=
72÷(8×9)×29=
215+342=
353-218=
3×(78-8)=
718-314=
45×40=
(52-13)÷13=
84÷7=
307-64=
20×(27+13)=
757-757=
428+165=
560÷(2+6)=
520÷13=
0×137=
72÷(8×9)×29=
答案
1.557 135 210
404 1800 3
12 243 800
0 593 70
40 0 29
404 1800 3
12 243 800
0 593 70
40 0 29
2.脱式计算。(每题4★)
$330 - 225 ÷ (43 - 38)$
$(123 + 455 ÷ 91) × 6$
$462 ÷ [3 × (178 - 156)]$
$25 × [(173 - 29) ÷ 12]$
$(137 + 26) × (306 - 294)$
$[618 - (236 - 174)] × 9$
$330 - 225 ÷ (43 - 38)$
$(123 + 455 ÷ 91) × 6$
$462 ÷ [3 × (178 - 156)]$
$25 × [(173 - 29) ÷ 12]$
$(137 + 26) × (306 - 294)$
$[618 - (236 - 174)] × 9$
答案
2.285 768
7 300
1956 5004
7 300
1956 5004
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