Question

-2.6+(+19)+(18) ; 1.5-5.4+(-1.6)+8.5 ; 4.37+(+3.65)+(-7.35)+6.63 вычеслите удобным способом 0.13+(-9.94)+(-2.13)+(0.06)=

Answer 1

-2.6+(+19)+(18) =-2.6+37=34.4

1.5-5.4+(-1.6)+8.5 =(1.5+8.5)+(-5.4-1.6)=10-7=3

4.37+(-3.65)+(-7.35)+6.63 =(4.37+6.63)+(-3.65-7.35)=11-11=0

0.13+(-9.94)+(-2.13)+(-0.06)=(-2.13+0.13)+(-9.94-0.06)=-2-10=-12