6. Вычислите, используя свойства умножения.
а) 8 × 44 + 8×56;
г) 7 × 23 +7 × 77;
б) 6× 146 - 6 × 46;
д) 6 × 81 + 81 ×9;
в) 4 × 70 + 30 × 4;
е) 4 × 30 + 70× 4.
а) 8 × 44 + 8×56;
г) 7 × 23 +7 × 77;
б) 6× 146 - 6 × 46;
д) 6 × 81 + 81 ×9;
в) 4 × 70 + 30 × 4;
е) 4 × 30 + 70× 4.
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Answers & Comments
а) 8 × 44 + 8×56 = 8 x ( 44+56) = 8x100= 800
г) 7 × 23 +7 × 77= 7 x (23+77) = 7 x 100 = 700
б) 6× 146 - 6 × 46 = 6 x ( 146-46) = 6x100 = 600
д) 6 × 81 + 81 ×9 = 81 x ( 6+9 ) = 81 x 15 = 2115
в) 4 × 70 + 30 × 4 = 4 x (70+30) = 4x100 = 400
е) 4 × 30 + 70× 4 = 4 x ( 30+70) 4x100 = 400