=4.56+4.44 + 37+47
=9+84
=93
.
23-8/9× 3/8 ÷ 1/27
=23-3 1×27
=23- 9
= 14
.
3.07× 10 1-3.07
=3.07×( 10 1- 1)
=3.07× 100
=307
.
8.92×7.9+2. 1×8.92+28.9
=8.92×(7.9+2. 1)+28.9
=8.92× 10+28.9
=89.2 + 28.9
=90 - 0.8 + 28 + 0.9
= 1 18 +0. 1
= 1 18. 1
.
9/ 10×5/9+4/9×9/ 10+9/ 10
=(9/ 10)×(5/9+4/9 + 1)
=(9/ 10)×2
=9/5
= 1 4/5