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Use mental math to simplify each expression
1. 36+12+4
2.19.2+0.6+12.4+ 0.8
3.2•16•10•5
4.12•18•0•16

Sagot :

Eahidn
1)  36+12+4=40+12=52
2)  19.2+0.6+12.4+0.8=20+13=33
3)  2*16*10*5=10*10*16=100*16=1600
4)  12*8*0*16=0
[tex]1.\\36+12+4=(36+4)+12=40+12=52\\\\2.\\19.2+0.6+12.4+0.8=(19.2+0.8)+(0.6+12.4)=20+13=33\\\\3.\\2\cdot16\cdot10\cdot5=(2\cdot5)\cdot(10\cdot16)=10\cdot160=1600\\\\4.\\12\cdot18\cdot0\cdot16=0\cdot(12\cdot18\cdot16)=0[/tex]
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