¯¯ ¯ 7-4
Estimating Products of Decimal Numbers
¯¯ ¯ I
¯ ¯ 1٫25 ¯
I
, ¯ ¯ 97 ¯
? ¯¯
? 3٫2 I¯
¯¯ ¯¯
¯ ¯¯ ¯
¿ ≈ 1 25 × 60
1 1, 2 5
6 0×
6 0×
60
60 ≈ 1٫25 × 60 ÇÐð Å
¯ 60 ¯ ¯¯
3٫2 I ¯ ¯ ¯
¿ = 97 × 3٫2
100 97
3, 2 ×
3×
300
300 ≈ 97 × 3,2 ÇÐð Å
3 2¯ 300 ¯ I ¯ ¯
¯? I ,¯ ¯ ¯ 1¯ ¯
?¯ 2
84