2025年通城学典计算能手五年级数学上册苏教版江苏专版第37页答案
一、按要求改写。
47000 = (
4.7
)万 360000000 = (
3.6
)亿
615400 = (
61.54
)万 7500000 = (
0.075
)亿
9088000000 = (
90.88
)亿 500400 = (
50.04
)万
4206000 = (
420.6
)万 451900 = (
45.19
)万
37580000 = (
0.3758
)亿 12078000000 = (
120.78
)亿
428000 = (
42.8
)万 894500000 = (
8.945
)亿
2048000000 = (
204800
)万 600000 = (
0.006
)亿
17024020000 = (
170.2402
)亿 40245600000 = (
4024560
)万

答案

一、4.7 3.6 61.54 0.075 90.88 50.04 420.6 45.19 0.3758 120.78 42.8 8.945 204800 0.006 170.2402 4024560
二、计算下面各题,怎样简便就怎样计算。
125 + 240 ÷ (36 - 21) (126 - 87) × 12 ÷ 36 (75 + 315) ÷ (35 - 20)
69 × 27 + 73 × 69 99 × 64 + 32 × 2 1450 ÷ [2 × (16 + 9)]

答案

二、141 13 26 6900 6400 29

解析

125 + 240 ÷ (36 - 21)
= 125 + 240 ÷ 15
= 125 + 16
= 141
(126 - 87) × 12 ÷ 36
= 39 × 12 ÷ 36
= 468 ÷ 36
= 13
(75 + 315) ÷ (35 - 20)
= 390 ÷ 15
= 26
69 × 27 + 73 × 69
= 69 × (27 + 73)
= 69 × 100
= 6900
99 × 64 + 32 × 2
= 99 × 64 + 64
= 64 × (99 + 1)
= 64 × 100
= 6400
1450 ÷ [2 × (16 + 9)]
= 1450 ÷ [2 × 25]
= 1450 ÷ 50
= 29