一、直接写出得数。(每题1分,共24分)
$3 + 6 - 3 = $ $10 - 6 + 5 = $ $16 - 4 + 3 = $
$10 - 3 + 1 = $ $9 - 4 + 3 = $ $11 + 6 - 3 = $
$14 + 2 - 4 = $ $14 - 10 + 5 = $ $10 - 7 + 2 = $
$19 - 9 + 8 = $ $18 - 10 - 2 = $ $8 + 2 - 5 = $
$10 - 2 + 1 = $ $13 + 5 - 7 = $ $18 - 3 + 4 = $
$7 + 2 - 5 = $ $4 + 12 - 10 = $ $7 - 4 + 3 = $
$13 - 2 + 7 = $ $10 - 6 + 2 = $ $11 + 7 - 8 = $
$16 - 2 + 5 = $ $18 - 4 - 10 = $ $19 - 1 - 7 = $
$3 + 6 - 3 = $ $10 - 6 + 5 = $ $16 - 4 + 3 = $
$10 - 3 + 1 = $ $9 - 4 + 3 = $ $11 + 6 - 3 = $
$14 + 2 - 4 = $ $14 - 10 + 5 = $ $10 - 7 + 2 = $
$19 - 9 + 8 = $ $18 - 10 - 2 = $ $8 + 2 - 5 = $
$10 - 2 + 1 = $ $13 + 5 - 7 = $ $18 - 3 + 4 = $
$7 + 2 - 5 = $ $4 + 12 - 10 = $ $7 - 4 + 3 = $
$13 - 2 + 7 = $ $10 - 6 + 2 = $ $11 + 7 - 8 = $
$16 - 2 + 5 = $ $18 - 4 - 10 = $ $19 - 1 - 7 = $
答案:
6 9 15 8 8 14 12 9 5 18 6 5 9 11 19 4 6 6 18 6 10 19 4 11
二、在$◯$里填“$>$”“$<$”或“$=$”。(每题2分,共12分)
$10 - 3 - 6◯9 - 7 + 3$ $16 - 1 + 4◯14 - 2 + 3$
$4 + 5 + 10◯15 - 2 + 4$ $7 + 10 - 0◯13 - 3 + 4$
$13 - 2 + 3◯10 + 7 - 2$ $18 - 8 + 4◯15 - 4 + 3$
$10 - 3 - 6◯9 - 7 + 3$ $16 - 1 + 4◯14 - 2 + 3$
$4 + 5 + 10◯15 - 2 + 4$ $7 + 10 - 0◯13 - 3 + 4$
$13 - 2 + 3◯10 + 7 - 2$ $18 - 8 + 4◯15 - 4 + 3$
答案:
< > > > < =
三、在$◯$里填“$+$”或“$-$”。(每式2分,共18分)
$10◯7◯3 = 6$ $15◯4◯3 = 16$ $10◯6◯2 = 14$
$14◯4◯4 = 6$ $7◯3◯5 = 15$ $9◯3◯4 = 10$
$7◯2◯4 = 9$ $4◯13◯10 = 7$ $18◯8◯6 = 16$
$10◯7◯3 = 6$ $15◯4◯3 = 16$ $10◯6◯2 = 14$
$14◯4◯4 = 6$ $7◯3◯5 = 15$ $9◯3◯4 = 10$
$7◯2◯4 = 9$ $4◯13◯10 = 7$ $18◯8◯6 = 16$
答案:
- + + - + - - - + + - + - + + - - +
四、在$□$里填合适的数。(每式2分,共12分)
$3 + □ = 9 - 1 - 1$ $0 + 8 + □ = 10$ $2 + □ + 4 = 5 + 5 - 2$
$4 + 6 = □ + 5 + 2$ $3 + □ + 4 = 9$ $10 - 1 - □ = 3 + 4 - 2$
$3 + □ = 9 - 1 - 1$ $0 + 8 + □ = 10$ $2 + □ + 4 = 5 + 5 - 2$
$4 + 6 = □ + 5 + 2$ $3 + □ + 4 = 9$ $10 - 1 - □ = 3 + 4 - 2$
答案:
4 2 2 3 2 4
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