34.56-(4.56-3.7)
=34.56-4.56+3.7
=33.7
6.6-2.91+3.4-1.09
=(6.6+3.4)-(2.91+1.09)
=10-4
=6
3.125+(6.875-1.72)-3.28
=(3.125+6.875)-(1.72+3.28)
=10-5
=5
4.99+4.99+4.99+0.04+4.99
=(5-0.01)×4+0.04
=5×4-0.01×4+0.04
=20-0.04+0.04
=20
34.56-（4.56-3.7）= 6.6-2.91+3.4-1.09= 3.125+（6.875-1.72）-3.28
3个回答
相关问题
-
（3.91+3又3/ 7+6.09+6又4/ 7）*（2又1/ 8-1.125）=?说明简便方法!
-
int c[][4]={1,2,3,4,5,6,7,34,213,56,62,3,23,12,34,56}; print
-
（1.2+2.3+3.4+4.5+5.6+6.7）/（12+23+34+45+56+67）
-
[1.2+2.3+3.4+4.5+5.6/12+23+34+45+56]．
-
main() { int c[][4]={1,2,3,4,5,6,7,34,213,56,62,3,23,12,34,5
-
12 +23 +34+ 45 +56+ 67 +78 +89/1.2+ 3.4 +4.5 +5.6+6.7+ 7.8 +
-
12+23+34+45+56+67+78+89-(1+2+2+3+3+4+4+5+5+6+6+7+7+8+8+9)
-
4.7*3.56+2.5*3.56+6.44*7.2(简便运算）
-
9+1-2/2-8+4+5+6+7+8+9-1-2-3-4-56/56?
-
56-1-3-4-6-8-9-2-7-5