一、按要求改写。
47000 = (
4206000 = (
37580000 = (
615400 = (
9088000000 = (
428000 = (
2048000000 = (
17024020000 = (
47000 = (
4.7
)万 360000000 = (3.6
)亿4206000 = (
420.6
)万 7500000 = (0.075
)亿37580000 = (
0.3758
)亿 500400 = (50.04
)万615400 = (
61.54
)万 451900 = (45.19
)万9088000000 = (
90.88
)亿 600000 = (0.006
)亿428000 = (
42.8
)万 40245600000 = (4024560
)万2048000000 = (
204800
)万 12078000000 = (120.78
)亿17024020000 = (
170.2402
)亿 894500000 = (8.945
)亿答案
一、4.7 3.6 420.6 0.075 0.3758 50.04 61.54 45.19 90.88 0.006 42.8 4024560 204800 120.78 170.2402 8.945
二、计算下面各题,怎样简便就怎样计算。
624÷12×8 - 250 (132 + 68)×(97 - 57) 75÷[138÷(100 - 54)]
810÷18÷5 75 + 720÷(42 - 27) (2025 + 1175)÷25÷4
624÷12×8 - 250 (132 + 68)×(97 - 57) 75÷[138÷(100 - 54)]
810÷18÷5 75 + 720÷(42 - 27) (2025 + 1175)÷25÷4
答案
二、166 8000 25 9 123 32
解析
624÷12×8 - 250
=52×8 - 250
=416 - 250
=166
(132 + 68)×(97 - 57)
=200×40
=8000
75÷[138÷(100 - 54)]
=75÷[138÷46]
=75÷3
=25
810÷18÷5
=810÷(18×5)
=810÷90
=9
75 + 720÷(42 - 27)
=75 + 720÷15
=75 + 48
=123
(2025 + 1175)÷25÷4
=3200÷(25×4)
=3200÷100
=32
=52×8 - 250
=416 - 250
=166
(132 + 68)×(97 - 57)
=200×40
=8000
75÷[138÷(100 - 54)]
=75÷[138÷46]
=75÷3
=25
810÷18÷5
=810÷(18×5)
=810÷90
=9
75 + 720÷(42 - 27)
=75 + 720÷15
=75 + 48
=123
(2025 + 1175)÷25÷4
=3200÷(25×4)
=3200÷100
=32
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