б)
750000 = 75 ⋅ 100 ⋅ 100 = 8,7 ⋅ 100 = 870 ;
в)
0,75 = 75 ⋅ 0,01 ≈ 8,7 ⋅ 0,1 = 0,87 ;
г)
0,0075 = 75 ⋅ 0,0001 ≈ 8,7 ⋅ 0,01 = 0,087 .
№370 а) 57600 = 576 ⋅ 100 = 576 ⋅ 10 = 24 ⋅ 10 = 240 ; б)
230400 = 2304 ⋅ 100 = 2304 ⋅ 100 = 48 ⋅ 10 = 480 ;
в)
152100 = 1521 ⋅ 100 = 1521 ⋅ 100 = 39 ⋅ 100 = 390 ;
г)
129600 = 1296 ⋅ 100 = 1296 ⋅ 100 = 36 ⋅ 10 = 360 ;
д)
20,25 =
е)
9,61 =
ж)
0,0484 =
з)
2025 = 100
2025 100
=
45 = 4,5 ; 10
961 961 31 = = = 3,1 ; 100 100 10
0,3364 =
484 = 10000 3364 = 10000
484 10000 3364 10000
= =
22 = 0,22 ; 100 58 = 0,58 . 100
№371. а) 44100 = 441 ⋅ 100 = 441 ⋅ 100 = 21 ⋅ 10 = 210 ; б) 435600 = 4356 ⋅ 100 = 4356 ⋅ 100 = 66 ⋅ 10 = 660 ; в) 0,0729 = 729 ⋅ 0,0001 = 729 ⋅ 0,0001 = 27 ⋅ 0,01 = 0,27 ; г)
15,21 = 1521 ⋅ 0,01 = 1521 ⋅ 0,01 = 39 ⋅ 0,1 = 3,9 .
№372 а) 2 ⋅ 8 = 16 = 4 ; б) 27 ⋅ 3 = 81 = 9 ; в) 28 ⋅ 7 = 196 = 14 ; г) 2 ⋅ 32 = 64 = 8 ; д) 13 ⋅ 52 = 676 = 22 ; е) 63 ⋅ 7 = 441 = 21 ;
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