1. I can put the correct answer in brackets in the PK competition. (2 points for each question, *** 20 points)
1.
2.
1 1 ×7 and
7× them 14 14
7 tons = 8 3 days = 4
Similarly,
2 hours = 513km = 25
3 8
It's different. Decimeter sky
Kilogram hour, the reciprocal is
The reciprocal of 3.2 is
place
The reciprocal of 1.3 is,
3 9 ×3 = rewritten into two division formulas111.
Put in 7
The number of sunny and rainy days is determined by yourself.
2. Seven
Days are regarded as units "
1" ,
6. The division of two numbers, also called two numbers, is preceded by this ratio.
. A: B (B ≠)
0) where ":"is called and the last item is. This is based on.
7.
The former item is 0.3: 1 expansion 10 times, and the latter item 1 should also be qualitatively kept unchanged.
8. The areas of two triangles are equal, and the ratio of their base lengths is
7:
8, their high proportion is
9. It is known that the right picture is a right-angled trapezoid, c ∠ d.
2, ∠B is ∠C 3
.
A
B
2 times, ∠B is
Degree.
D
Ratio of boys to class size
10.6 (
1 class: 25 boys and 20 girls). The ratio of girls to boys is.
Second, I am an impartial judge who can accurately judge right and wrong. (5 points)
1.2m conductor for
Or use rice, and the rest are all the same length.
( ( (
1 .n
) ) )
2. Two numbers whose product is 1 are reciprocal.
3.0 and 1 are not reciprocal.
Divide a number into n parts and find out what each part is. You can multiply this number.
5. Triangle 3
The ratio of the two sides is 5: 6:
7. The circumference is 54 decimeters. The lengths of the three sides of this triangle are 15 decimeter, 18 decimeter and 2 1 decimeter respectively. ()
Everything is for the development of students.
Everything is for the wishes of parents.
Happy ABC, I chose quickly and accurately. (2 points for each question, *** 10)
1. It takes 8 minutes to walk from school to Party A and 9 minutes to Party B.. The distance ratio between Party A and Party B per minute is (a).
8:9
2.a \b = a . >
Multiply a number by a.b.
9:8 degrees Celsius.
8:
1 9
)
1(neither a nor b
0) A，2
B.（
B.