问题
解答题
递等式计算(能简算的要简算).
(1)9.76÷3.2×1.6
(2)(8+8)×12.5
(3)7.5×2.3+2.3×3.5-2.3
(4)10.5÷(5.3-4.6)+8.9.
答案
(1)9.76÷3.2×1.6,
=3.05×1.6,
=4.88;
(2)(8+8)×12.5,
=8×12.5+8×12.5,
=100+100,
=200;
(3)7.5×2.3+2.3×3.5-2.3,
=2.3×(7.5+3.5-1),
=2.3×10,
=23;
(4)10.5÷(5.3-4.6)+8.9,
=10.5÷0.7+8.9,
=15+8.9,
=23.9.