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Name _____________________________
Date ___________________
Mixed Review
Complete.
1.  
2
5
+ 5
.05
.7
.494



2.  
30
20
+ 2
.201
.6
.37



3.  
6
4
+ 2
.54
.987
.3



4.  
34
2
+ 77
.5
.04
.514




Complete.
5.   Nanotechnology is an exciting field concerned with very tiny machines. A new technique pioneered by Small World, Inc., can produce some exceedingly small levers that are triangular in shape. The new nanotriangles are right triangles with a base of 140 nm and a height of 40 nm. What is the area (in m2) of such a small triangle? Express you answer using scientific notation.

6.   Emily is grinding a part for a spacecraft to be sent on a mission to mars. The part must be very precise. Right now it is oversized by 2.54 x 10-3 inches. If she makes two passes with the grinding machine and takes off half the required amount each time, how much will be ground off on each pass?


Order the decimals from greatest to least.
7.   8.74, 8.69, 8.26
8.   4.9, 5.7, 4.50
9.   2.07, 2.5, 1.8
10.   5.80, 5.97, 5.8

 

Key #2
Order the numbers from least to greatest.
11.   2,058;   2,453;   2,540;   9,037



12.   56,291;   31,470;   38,089




Fill in the missing number.
13.   6 -  + 3  =  5
14.    - 1 + 1  =  8
15.    + 3 - 4  =  8
16.    - 1 + 4  =  10
17.   9 - 3 +   =  8
18.   9 - 3 +   =  10

Simplify.
19.    (0.6 ÷ 0.04)  ×  (16 + 2.27)  × 38.44


20.   7.5 +  (962 ÷ 2)  - 24


21.    (0.36 ÷ 0.04)  +  (36 × 50.2 - 2.60) 


22.    (98.9 + 37.4)  -  (3.84 ÷ 0.06) 



Fill in the missing operation.
23.   56  35 ÷ 7  =  51
24.   87 × 1  3 - 5  =  79
25.   74  2 × 20  =  740
26.   79  2 × 1 × 41  =  161





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