Please don't spam need answer with full explanation for std 7 CBSE. on a notebook pls urgent. ItzDarknessshadow65 pls
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Answer:
7. 230 / 8. 180 / 9. 0 / 10. 23
Step-by-step explanation:
7. |21÷(-7)+12|×21+5
=|-3+12|×25+5
=9×25+5
=225+5
=230
8. 72 of 46×20÷(20+3)-2700
=(3312×20)÷23-2700
=66240÷23-2700
=2880-2700
=180
9. 22-[5+13÷{7×2+(5-3) of 6}×34]
=22-[5+13÷{14+2 of 6}×34]
=22-[5+13÷{14+12}×34]
=22-[5+13÷26×34]
=22-[5+0.5×34]
=22-[5+17]
=22-22
=0
10. 3×5-[8-{12+36÷(10-1)}]
=15-[8-{12+36÷9}]
=15-[8-{12+4}]
=15-[8-16]
=15-([-8] (negative×negative=+ )
=15+8
=23
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