选择合理的方法计算.①5400-2940÷28×27②(14-110÷2)÷310③9×(49+114)+514④(115+217)×15×17.-数学
题文
选择合理的方法计算. ①5400-2940÷28×27 ②(
③9×(
④(
|
答案
①5400-2940÷28×27, =5400-105×27, =5400-2835, =2565; ②(
=(
=
=
③9×(
=9×
=4+
=4+(
=4+1, =5; ④(
|
题文
选择合理的方法计算. ①5400-2940÷28×27 ②(
③9×(
④(
|
答案
①5400-2940÷28×27, =5400-105×27, =5400-2835, =2565; ②(
=(
=
=
③9×(
=9×
=4+
=4+(
=4+1, =5; ④(
|