问题
解答题
用简便方法计算.
(1)8.9+7.63+2.37+1.1
(2)10.26×10+5.74×10.
答案
(1)8.9+7.63+2.37+1.1,
=(8.9+1.1)+(7.63+2.37),
=10+10,
=20;
(2)10.26×10+5.74×10,
=10×(10.26+5.74),
=10×16,
=160;
用简便方法计算.
(1)8.9+7.63+2.37+1.1
(2)10.26×10+5.74×10.
(1)8.9+7.63+2.37+1.1,
=(8.9+1.1)+(7.63+2.37),
=10+10,
=20;
(2)10.26×10+5.74×10,
=10×(10.26+5.74),
=10×16,
=160;