题目
计算. (1) (-20)+(-15) (2) (- )+(+ ) (3) (+20)-(-10) (4) (- )-(- ) (5) (- )×(- ) (6) (+3 )×(-5) (7) 23-18-(-9)+(-15) (8) -4 +8.4-(-4.75)+3 答案:解:(-20)+(-15)=-35
解:(- 12 )+(+ 23 )=- 36+46 = 16
解:(+20)-(-10)=20+10=30
解:(- 23 )-(- 32 )=- 46+96 = 56
解:(- 89 )×(- 94 )=2
解:(+3 25 )×(-5)= −175×5= -17
解:23-18-(-9)+(-15)=23-18+9-15=-1
解:-4 14 +8.4-(-4.75)+3 35 =-4.25+8.4+4.75+3.6=12.515、I smell something __________ in the kitchen. Can I
call you back in a minute?
A. burning
B. burnt C. being
burnt D. to be burnt