Page 72 - حقيبة كتاب الصف الخامس الرقمية
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¯ ¯ 3-4
Estimating Products
¯4 ¯¯ ,¯
?
¯ , 289 ¯
¯ : M ,289 × 4 ¯
¯¯ ¯ ¯ ¯ 289 ¯
300 289 300 289
4× 4× 4× 4×
¯ 1 200 1 200 1 200 ≈ 289 × 4
¯¯
2 112 176 × 12
: M ,176 × 12 ¯
¯ 176 200 ¯
12 10×
200 176
10× 12
2 000
¯ ,2 000 2 000 ≈ 176 × 12
¯ 2 112
?¯ ,¯ F
209 × 31 68 × 47
200 209 70 68
50× 47×
30× 31× 3 500
6 000 3 500 ≈ 68 × 47
6 000 ≈ 209 × 31 3 196 = 68 × 47
6 479 = 209 × 31
,¯ ¯ ¯ ,¯ ¯ ¯
¯¯ ¯¯
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