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33×3-99÷11用简便方法计算17×25×4028×(105-324÷12)43×22+43×7813.8-(1.94+2.21)各位,第一题10/11是神马意思啊?

题目详情
33×3-99÷11用简便方法计算
17×25×40 28×(105-324÷12) 43×22+43×78 13.8-(1.94+2.21)各位,第一题10/11是神马意思啊?
▼优质解答
答案和解析
33×3-99÷11
=99-99×11分之1
=99×(1-11分之1)
=99×(11分之11-11分之1)
=99×11分之10
=90
17×25×40
=17×1000
=17000
28×(105-324÷12)
=28×(105-27)
=28×78
=28×(80-2)
=2240-56
=2184
43×22+43×78
=43×(22+78)
=43×100
=4300
13.8-(1.94+2.21)
=13.8-4.15
=9.65